Scott Shawcroft
4 years ago
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8fa8737465
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70680d5b22
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/displayio/EPaperDisplay.h"
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#include "py/runtime.h"
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#include "shared-bindings/displayio/ColorConverter.h"
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#include "shared-bindings/displayio/FourWire.h"
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#include "shared-bindings/displayio/I2CDisplay.h"
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#include "shared-bindings/displayio/ParallelBus.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/time/__init__.h"
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#include "shared-module/displayio/__init__.h"
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#include "supervisor/shared/display.h"
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#include "supervisor/usb.h"
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#include <stdint.h>
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#include <string.h>
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#include "tick.h"
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void common_hal_displayio_epaperdisplay_construct(displayio_epaperdisplay_obj_t* self,
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mp_obj_t bus, uint8_t* start_sequence, uint16_t start_sequence_len, uint8_t* stop_sequence, uint16_t stop_sequence_len,
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uint16_t width, uint16_t height, uint16_t ram_width, uint16_t ram_height,
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int16_t colstart, int16_t rowstart, uint16_t rotation,
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uint16_t set_column_window_command, uint16_t set_row_window_command,
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uint16_t set_current_column_command, uint16_t set_current_row_command,
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uint16_t write_black_ram_command, bool black_bits_inverted, uint16_t write_color_ram_command, bool color_bits_inverted, uint32_t third_color, uint16_t refresh_display_command,
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const mcu_pin_obj_t* busy_pin, bool busy_state, mp_float_t seconds_per_frame, bool always_toggle_chip_select) {
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self->colorspace.depth = 1;
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self->colorspace.grayscale = true;
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self->colorspace.pixels_in_byte_share_row = true;
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self->colorspace.bytes_per_cell = 1;
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self->colorspace.reverse_pixels_in_byte = true;
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if (third_color != 0x000000) {
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self->colorspace.tricolor = true;
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self->colorspace.tricolor_hue = displayio_colorconverter_compute_hue(third_color);
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self->colorspace.tricolor_luma = displayio_colorconverter_compute_luma(third_color);
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}
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self->set_column_window_command = set_column_window_command;
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self->set_row_window_command = set_row_window_command;
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self->set_current_column_command = set_current_column_command;
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self->set_current_row_command = set_current_row_command;
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self->write_black_ram_command = write_black_ram_command;
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self->black_bits_inverted = black_bits_inverted;
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self->write_color_ram_command = write_color_ram_command;
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self->color_bits_inverted = color_bits_inverted;
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self->refresh_display_command = refresh_display_command;
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self->busy_state = busy_state;
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self->refresh = true;
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self->current_group = NULL;
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self->colstart = colstart;
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self->rowstart = rowstart;
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self->refreshing = false;
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self->milliseconds_per_frame = seconds_per_frame * 1000;
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self->always_toggle_chip_select = always_toggle_chip_select;
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self->start_sequence = start_sequence;
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self->start_sequence_len = start_sequence_len;
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self->stop_sequence = stop_sequence;
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self->stop_sequence_len = stop_sequence_len;
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if (MP_OBJ_IS_TYPE(bus, &displayio_parallelbus_type)) {
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self->bus_reset = common_hal_displayio_parallelbus_reset;
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self->bus_free = common_hal_displayio_parallelbus_bus_free;
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self->begin_transaction = common_hal_displayio_parallelbus_begin_transaction;
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self->send = common_hal_displayio_parallelbus_send;
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self->end_transaction = common_hal_displayio_parallelbus_end_transaction;
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} else if (MP_OBJ_IS_TYPE(bus, &displayio_fourwire_type)) {
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self->bus_reset = common_hal_displayio_fourwire_reset;
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self->bus_free = common_hal_displayio_fourwire_bus_free;
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self->begin_transaction = common_hal_displayio_fourwire_begin_transaction;
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self->send = common_hal_displayio_fourwire_send;
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self->end_transaction = common_hal_displayio_fourwire_end_transaction;
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} else if (MP_OBJ_IS_TYPE(bus, &displayio_i2cdisplay_type)) {
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self->bus_reset = common_hal_displayio_i2cdisplay_reset;
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self->bus_free = common_hal_displayio_i2cdisplay_bus_free;
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self->begin_transaction = common_hal_displayio_i2cdisplay_begin_transaction;
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self->send = common_hal_displayio_i2cdisplay_send;
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self->end_transaction = common_hal_displayio_i2cdisplay_end_transaction;
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} else {
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mp_raise_ValueError(translate("Unsupported display bus type"));
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}
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self->bus = bus;
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supervisor_start_terminal(width, height);
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self->width = width;
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self->height = height;
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rotation = rotation % 360;
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self->transform.x = 0;
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self->transform.y = 0;
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self->transform.scale = 1;
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self->transform.mirror_x = false;
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self->transform.mirror_y = false;
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self->transform.transpose_xy = false;
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if (rotation == 0 || rotation == 180) {
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if (rotation == 180) {
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self->transform.mirror_x = true;
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self->transform.mirror_y = true;
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}
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} else {
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self->transform.transpose_xy = true;
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if (rotation == 270) {
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self->transform.mirror_y = true;
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} else {
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self->transform.mirror_x = true;
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}
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}
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self->ram_width = ram_width;
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self->ram_height = ram_height;
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self->area.x1 = 0;
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self->area.y1 = 0;
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self->area.next = NULL;
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self->transform.dx = 1;
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self->transform.dy = 1;
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if (self->transform.transpose_xy) {
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self->area.x2 = height;
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self->area.y2 = width;
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if (self->transform.mirror_x) {
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self->transform.x = height;
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self->transform.dx = -1;
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}
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if (self->transform.mirror_y) {
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self->transform.y = width;
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self->transform.dy = -1;
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}
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} else {
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self->area.x2 = width;
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self->area.y2 = height;
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if (self->transform.mirror_x) {
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self->transform.x = width;
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self->transform.dx = -1;
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}
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if (self->transform.mirror_y) {
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self->transform.y = height;
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self->transform.dy = -1;
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}
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}
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self->busy.base.type = &mp_type_NoneType;
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if (busy_pin != NULL) {
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self->busy.base.type = &digitalio_digitalinout_type;
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common_hal_digitalio_digitalinout_construct(&self->busy, busy_pin);
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never_reset_pin_number(busy_pin->number);
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}
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// Set the group after initialization otherwise we may send pixels while we delay in
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// initialization.
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common_hal_displayio_epaperdisplay_show(self, &circuitpython_splash);
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}
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bool common_hal_displayio_epaperdisplay_show(displayio_epaperdisplay_obj_t* self, displayio_group_t* root_group) {
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if (root_group == NULL && !circuitpython_splash.in_group) {
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root_group = &circuitpython_splash;
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}
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if (root_group == self->current_group) {
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return true;
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}
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if (root_group != NULL && root_group->in_group) {
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return false;
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}
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if (self->current_group != NULL) {
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self->current_group->in_group = false;
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}
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if (root_group != NULL) {
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displayio_group_update_transform(root_group, &self->transform);
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root_group->in_group = true;
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self->current_group = root_group;
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}
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self->full_refresh = true;
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common_hal_displayio_epaperdisplay_refresh_soon(self);
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return true;
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}
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void common_hal_displayio_epaperdisplay_refresh_soon(displayio_epaperdisplay_obj_t* self) {
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self->refresh = true;
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}
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const displayio_area_t* displayio_epaperdisplay_get_refresh_areas(displayio_epaperdisplay_obj_t *self) {
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const displayio_area_t* first_area;
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if (self->current_group == NULL || self->current_group->base.type != &displayio_group_type) {
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asm("bkpt");
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}
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if (self->full_refresh) {
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first_area = &self->area;
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} else {
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first_area = displayio_group_get_refresh_areas(self->current_group, NULL);
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}
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if (first_area != NULL && self->set_row_window_command == NO_COMMAND) {
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self->area.next = NULL;
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return &self->area;
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}
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return first_area;
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}
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int32_t common_hal_displayio_epaperdisplay_wait_for_frame(displayio_epaperdisplay_obj_t* self) {
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uint64_t last_refresh = self->last_refresh;
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// Don't try to refresh if we got an exception.
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while (last_refresh == self->last_refresh && MP_STATE_VM(mp_pending_exception) == NULL) {
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MICROPY_VM_HOOK_LOOP
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}
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return 0;
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}
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uint16_t common_hal_displayio_epaperdisplay_get_width(displayio_epaperdisplay_obj_t* self){
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return self->width;
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}
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uint16_t common_hal_displayio_epaperdisplay_get_height(displayio_epaperdisplay_obj_t* self){
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return self->height;
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}
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bool displayio_epaperdisplay_bus_free(displayio_epaperdisplay_obj_t *self) {
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return self->bus_free(self->bus);
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}
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bool displayio_epaperdisplay_begin_transaction(displayio_epaperdisplay_obj_t* self) {
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return self->begin_transaction(self->bus);
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}
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void displayio_epaperdisplay_end_transaction(displayio_epaperdisplay_obj_t* self) {
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self->end_transaction(self->bus);
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}
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STATIC void wait_for_busy(displayio_epaperdisplay_obj_t* self) {
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if (self->busy.base.type == &mp_type_NoneType) {
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return;
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}
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while (common_hal_digitalio_digitalinout_get_value(&self->busy) == self->busy_state) {
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#ifdef MICROPY_VM_HOOK_LOOP
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MICROPY_VM_HOOK_LOOP
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#endif
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}
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}
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STATIC void send_command_sequence(displayio_epaperdisplay_obj_t* self, bool should_wait_for_busy, uint8_t* sequence, uint32_t sequence_len) {
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uint32_t i = 0;
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while (i < sequence_len) {
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uint8_t *cmd = sequence + i;
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uint8_t data_size = *(cmd + 1);
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bool delay = (data_size & DELAY) != 0;
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data_size &= ~DELAY;
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uint8_t *data = cmd + 2;
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self->begin_transaction(self->bus);
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self->send(self->bus, true, self->always_toggle_chip_select, cmd, 1);
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self->send(self->bus, false, self->always_toggle_chip_select, data, data_size);
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self->end_transaction(self->bus);
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uint16_t delay_length_ms = 0;
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if (delay) {
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data_size++;
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delay_length_ms = *(cmd + 1 + data_size);
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if (delay_length_ms == 255) {
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delay_length_ms = 500;
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}
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}
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common_hal_time_delay_ms(delay_length_ms);
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if (should_wait_for_busy) {
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wait_for_busy(self);
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}
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i += 2 + data_size;
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}
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}
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void displayio_epaperdisplay_set_region_to_update(displayio_epaperdisplay_obj_t* self, displayio_area_t* area) {
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if (self->set_row_window_command == NO_COMMAND) {
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return;
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}
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uint16_t x1 = area->x1;
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uint16_t x2 = area->x2;
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uint16_t y1 = area->y1;
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uint16_t y2 = area->y2;
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// Collapse down the dimension where multiple pixels are in a byte.
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uint8_t pixels_per_byte = 8 / self->colorspace.depth;
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x1 /= pixels_per_byte * self->colorspace.bytes_per_cell;
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x2 /= pixels_per_byte * self->colorspace.bytes_per_cell;
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// Set column.
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uint8_t data[5];
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data[0] = self->set_column_window_command;
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self->send(self->bus, true, self->always_toggle_chip_select, data, 1);
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uint8_t data_length = 0;
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if (self->ram_width / pixels_per_byte < 0x100) {
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data[data_length++] = x1 + self->colstart;
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data[data_length++] = x2 - 1 + self->colstart;
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} else {
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x1 += self->colstart;
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x2 += self->colstart - 1;
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data[data_length++] = x1 >> 8;
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